Digital circuit board tester



FIG. 1 is a top plan view of a digital circuit board tester showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a rear elevational view;

FIG. 6 is a bottom plan view; and

FIG. 7 is a top, front, and left side perspective view thereof. 

The ornamental design for a digital circuit board tester, as shown and described. 